"Glee: The 3D Concert Movie" hasn't conquered movie theaters --- unlike what the franchise accomplished with television, iTune downloads, and live concert tours. Seems "Glee" took one entertainment step too many. Fox Filmed Entertainment looked to do what any modern media company with a big valuable asset would do -- eke out a few more shekels, not the least of which would come from a premium 3D ticket price. The movie -- with a pretty nice wide release on over 2,000 screens -- earned a humble $6 million this past weekend, coming in 11th place among all movies. But, one Fox executive told The Wrap, the studio knew the film wouldn't be a lock, that it could be going into "uncharted waters." "Glee"'s pedigree wouldn't have signaled this. Even before its premiere a couple of seasons ago, Fox television executives had sold the show highly to critics as the next big thing. And -- rare for such claims - "Glee" delivered big juicy ratings. Next came those music sales, then the concerts. All that is hard to do in the ever-more competitive entertainment world. And give "Glee" some more credit: It will honor its storyline. Those "Glee" kids entering their senior year this season will need to "graduate" -- that is, leave the show. (Hey, the cast of Disney Channel's "High School Musical" needed to graduate as well. And, mind you, there is already talk of a "Glee" spinoff.) What went wrong with the movie? While "Glee" has done a lot for Fox in its short history, some critics say fans perhaps didn't need more of the "Glee"-sters singing songs they had already heard on the TV show, via iTunes, or in concert. Reasons the film might have worked included: